Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for separating and purifying bismuth from tin electrolytic anode slime

A technology of anode slime and electrolyte, applied in the field of separation and enrichment of non-ferrous metals, can solve the problems of complex refined bismuth process, cumbersome operation, and large equipment consumption, and achieve simple and easy process, improved economic benefits, and less pollution Effect

Inactive Publication Date: 2015-12-30
GEJIU ZILI MINING & METALLURGY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of preparing refined bismuth is very complicated, and the operating temperature rises and falls repeatedly, the operation is cumbersome, the energy consumption is high, the equipment consumption is large, the laboratory analysis is frequent, especially the harmful gas chlorine gas is introduced, the operating conditions are harsh, the surrounding environment is polluted, and the output is large. All kinds of slag are not easy to recycle

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for separating and purifying bismuth from tin electrolytic anode slime

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put 500kg of anode slime of electrolytic tin into the reaction kettle, add 1m of water 3 , add sulfuric acid solution to adjust the pH value to 0.5, heat it to 80°C under stirring conditions and keep it warm for 0.5h. After filtering, the obtained filter residue is returned to the electric furnace to obtain filtrate a; add a large amount of iron filings to the filtrate a, and keep the temperature at 40°C , let it stand for 5 hours, and filtered to obtain metal powder mainly containing antimony, copper, and bismuth; put the metal powder into a volatilization furnace and heat it, and keep it warm for 0.5 hours at a temperature of 600°C. After quenching the device, use a cloth bag to recover; for the alloy after volatilization of antimony, when the temperature is 200°C, add an appropriate amount of sulfur, stir slowly, and the copper sulfide formed by copper and sulfur floats on the surface of the molten alloy liquid, and salvage and recover copper sulfide; after sulfidatio...

Embodiment 2

[0029] Put 500kg of anode slime of electrolytic tin into the reaction kettle, add 0.5m of water 3 , adding sulfuric acid solution to adjust the pH value to 1, heating to 100°C under stirring conditions, and then keeping it warm for 2 hours. After filtering, the obtained filter residue was returned to the electric furnace to obtain filtrate a; a large amount of iron filings was added to filtrate a, and the temperature was maintained at 40°C. Stand still for 5 hours, after filtering, get the metal powder mainly containing antimony, copper and bismuth; put the metal powder into the volatilization furnace and heat it, keep it warm for 0.5 hours at a temperature of 800°C, the antimony will be oxidized to form antimony white, enter the smoke and dust, and pass through the heat exchanger After rapid cooling, use a cloth bag to recover; for the alloy after volatilization of antimony, when the temperature is 300°C, add an appropriate amount of sulfur and stir slowly, the copper sulfide ...

Embodiment 3

[0031] Put 500kg of anode slime of electrolytic tin into the reaction kettle, add 1.5m of water 3 , adding a mixed solution of sulfuric acid and nitric acid to adjust the pH value to 2, heated to 90°C under stirring conditions, and then kept the temperature for 1.5h. After filtering, the obtained filter residue was returned to the electric furnace, and the obtained filtrate a; The temperature is 40°C, let it stand for 36 hours, and after filtration, the metal powder mainly containing antimony, copper, and bismuth is obtained; put the metal powder into a volatilization furnace to heat, and keep it at a temperature of 700°C for 1 hour, and the antimony is oxidized to form antimony white, which enters the smoke and dust , after being quenched by a heat exchanger, use a cloth bag to recover; for the alloy after volatilization of antimony, when the temperature is 250°C, add an appropriate amount of sulfur and stir slowly. The alloy after sulfidation and copper removal is poured int...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for separating and purifying bismuth from tin electrolytic anode mud. The method comprises the steps of leaching by acid, replacing, volatilizing antimony, removing copper by vulcanizing, and electrolyzing by silicofluoric acid. The method specifically comprises the following steps: leaching out metal elements in the tin electrolytic anode mud by the acid, filtering, replacing in filter liquor by iron scrap, heating for volatilizing alloy powder obtained by replacing to volatilize the metallic antimony, recovering antimony white from smoke dust, adding sulfur into alloy after antimony volatilization to remove the copper from the alloy to obtain crude bismuth alloy, pouring the crude bismuth alloy to form an anode plate, electrolyzing in a silicofluoric acid solution, applying the electrolyzed anode mud to recovery of gold and silver elements, re-pouring a residual electrode plate to form an anode plate, and obtaining the high-purity bismuth from a cathode. According to the method, the processes of wet leaching, fire impurity removal and electrolytic refining are adopted for the tin anode mud, so that the metal elements in the tin anode mud are comprehensively recovered and the high-purity bismuth is obtained by electrolysis; the operation is easy and convenient, the tin electrolytic anode mud is comprehensively recycled, and the economic benefit is increased.

Description

technical field [0001] The invention belongs to the technical field of separation and enrichment of nonferrous metals, and in particular relates to a process for separating and purifying bismuth from tin electrolytic anode slime. Background technique [0002] The anode slime produced by the tin electrolysis process is enriched with precious metals, rare metals and other valuable metals. These metals occupy a very important position in the national economy, and extracting these metals from anode slime can obtain great economic benefits. The anode slime produced by tin electrolysis is rich in metal elements such as bismuth, antimony, copper, gold, silver, etc. However, the metal elements in the anode slime have complex shapes and similar properties, and are difficult to separate from each other. At present, the combination of hydrometallurgy and pyrometallurgy is used to process the tin smelting anode slime, after acid leaching, iron powder reduction and replacement, the repl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/22
CPCY02P10/20
Inventor 谭绪云段雄伟杨波邰旭波念光谷
Owner GEJIU ZILI MINING & METALLURGY